Improvement in quartz-crushers



L. w WILLIAMS.

Ore Mill.

No. 37,020. Patented Nov. 25,1862.

WZZIwJSw I Z UNITED STATES PATENT Grinch.

LORING WV. \VILLIAMS, OF NEVADA, CALIFORNIA.

lMPROVEMENT IN QUARTZ-CRUSHERS.

Specification forming part of Letters Patent No. 37,020 dated November 25, 18(2.

To all whom it may concern.-

Be it known that I, LORING W. WILLtAMs, of the city and county of Nevada,ancl State of California, have invented a new and improved machine for grinding and reducing quartz, tailings, sulphurites, or other partially-reduced rock or ore; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

The nature of myinvention consists in com structing the inside bottom of circular grinding-beds in which partially-reduced quartzrock or other rock or ore is to be ground of a series of inclined or inclined-curved surfaces, commencing at any desired base and produced to any required height, and over and in 0011- tact with which grinders under spring-pressure are caused to slide, and by. their passage over such inclined or inclined-curved surfaces are alternately raised and lowered, bringing the matter to be reduced constantly and repeatedly under the full influence of the grinding-power.

To enable others skilled in mechanics to make and use my invention, I will proceed to describe its construction and operation.

Figure 1 of the accompanying drawings is a perspective view of the machine to be de scribed.

B is a circular grindingbed, the inside bottom of which is composed of three inclinedor inclined-curved surfaces, 6 i i. (Two of said inclines are shown in Fig.2.) These inclines may commence at a common base and be produced to a uniform height,or may consist ofaseries ofinclines, each succeeding one of which (from the first) has its base and point of termination above or belowthe preceding one. The angle of in-. clination of theinclines may be uniform at the line of boundary most remote from the center of the circle, and that nearest the center of such circle, or the outer and inner boundarylines of the inclines may have a difterent angle of inclination. In either case the result is substantially the same.

0 is the inner circle of the grinding-bed B, and forms a support for the shaft 0, which passes through the frame F.

\V is a bevel-wheel.

EE is an cared wheel hung upon the shaft 0, and having the arms A A A A attached to it.

H H H H are levers firmly attached to the segmental grinders G G G G. (two ofthe grinders. as also two of said levers, are shown in in Fig. 2,) and hung by the reverse end to the arms A A A A in such manner as to permit the grinders G G G Gto be raised and lowered a distance equal to the height attained by the inclines i The length of the levers H H H H is such that the bottom surfaces of the grinders shall conform through all parts of a revolution to the angle of inclination of the inclines i i i.

S S S S are springs radiating from the shaft 0.

U U U U are bars projecting upward from thelevers H H H H, and hung to the same by a hinge or movablejoint. Such bars pass through supports NNNN affixed to the eared wheel E E. (Two of the springs S S S S and two of the bars U U U U, with their connec tion to the levers H H H H. may be seen in Fig. 2.) The bars U U U U press upward against the springs S S S S. By using setscrews or some other convenient device, in conjunction with the springs S S S S, any desired amount of pressure may be placed upon the grinders G G G G in such a manner that their weight in themselves need be but small. The effect of the springs is also such that the grinders descend the curve at the drop-off B, Fig. 2, almost instantaneously making it practicable to use this machine at very high speed.

D is the discharge, through which escapes the material operated upon when reduced to sufficient fineness to rise up in the water and flow out. The degree desired can be readily regulated by raising 0r lowering the point of discharge D. The higher this point is placed the finer the material operated upon is reduced before it will rise to the surface of the water (with which the grinding-bed Bis filled) and escape from the machine.

It is not necessary that the grinding-bed B be cast with a rim of sufficient height to admit of regulating the point of discharge D. The deficiency in depth of rim may be supplied by a removable sheet-iron rim,which can be taken off when the machine is to be cleaned of the result of an operation. If desired, the degree of fineness may also be regulated without raising the point of discharge D. This can be readily effected by interposing at place of discharge a sieve of any desired fineness.

In operating with this machine,quicksilver is placed in the drop R of each incline. Water is then admitted at some point, as V, bringing with it, if desired, the partially-reduced rock or ore directly from the stamps. The machine is then rotated in the direction of the arrows seen in Fig. 2. The grinders G G G G in coming down the curve of the drop R of each incline slide down on the back heel, bringing with and depositing all matter before or under them in the drop R. The grinder,sliding down the curve of the d op R,then places itself directly upon the material to be reduced with an abrasive rubbing motion. The operation of the inclinesz' t t and the drops R R R, in conjunction with the grinders G G G G and the springs S S S S, is to place all matter in the machine directly under and subject to the full action of the gri riding-power three times in each revolution of the machine. The quicksilver is at the same time rubbed and eommingled with the ground rock or ore, performing the operation of amalgamating the precious metals liberated.

The grinders G G G G may be of iron, stone, or any substance of sufficient hardness,whether of great specific gravity or not, the springs S S S S operating in such manner that any necessary pressure can be placed upon such grinders.

I do not confine the inclines or grinders to any specified number. In each case the speed desired and the size of the machine should be taken into consideration. The cast-iron grinding bed or basin B, Fig. 1, is substantially the same (including its inclines t z 2') as the circular battey B,with its inclines, described in the specification attached to Patent No. 20,012, which was granted me, April 20, A. D. 1858,

and the entire right of which is vested in me at this time.

The improvement sought to be patented by this application is the combination of sliding grinders, under spring'pressure, with the inclines t i i, Fig. 2. in place of the rolling wheels to w w 20 described in the specification of Patent No. 20,012. By this combination a machine is produced specially adapted for grinding quartz-rock, sulphurites, or other rock or ore, which has been partially reduced under stamps, or by other means. The height to which theinelined or inclined-curved surfaces M i should be produced will in practice probably range from two to five inches in heightcenter measure in width of incline at drop R. I do not, however, confine the inclines to any specified height.

I do not claim the circular grinding-bed nor any part or portion of the herein-described machine, taken singly.

\\hat I claim under] this application, and desire to secure by Letters Patent, is as follows:

1. The segmentary grinders G G G G, or their equivalent, in combination with the inclined or inclined-curved surfaces 6 i i, operating in the manner and for the purposes set forth.

2. The springs S S S S,or their equivalent, in combination with the grinders G G G G, and the inclined or inclined-curved surfaces 6 i t, the whole operating substantially in the manner and for the purposes herein described.

LORIN G W. WILLIAMS.

Witnesses:

THOMPSON HAMES, J N0. L. GAMBLE. 

